/*当前屏幕宽度小于600px时*/
.wrap{
	border: 1px solid green;
	width: 100%;
	padding: 10px 0;
}
.header{
	width: 100%;
	height: 100px;
	background: red;
	margin-bottom: 10px;
}
.sidebar{
	width: 100%;
	height: 100px;
	background: green;
	margin-bottom: 10px;
}
.content{
	width: 100%;
	height: 100px;
	background: blue;	
}